(2E)-Dimethyl 2,2'-((1S,3S,7R,11S,12S,15S,17R,21R,23R,25S,E)-25-((tert-butyldimethylsilyl)oxy)-17-(((tert-butyldimethylsilyl)oxy)methyl)-11,21-dihydroxy-10,10,26,26-tetramethyl-12-(octanoyloxy)-19-oxo-18,27,28,29-tetraoxatetracyclo[21.3.1.13,7.111,15]nonacos-8-ene-5,13-diylidene)diacetate 在
氟化氢吡啶 作用下,
以
四氢呋喃 为溶剂,
以32%的产率得到(2Z,2'E)-Dimethyl 2,2'-((3S,7R,11S,12S,15S,17R,21R,23R,25S,E)-11,21,25-trihydroxy-17-(hydroxymethyl)-10,10,26,26-tetramethyl-12-(octanoyloxy)-19-oxo-18,27,28,29-tetraoxatetracyclo[21.3.1.13,7.111,15]nonacos-8-ene-5,13-diylidene)diacetate